io2 UPPER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



on the last chamber ; its highly beaded keels and dorsal sutures ; inclined 

 peripheral band ; raised, beaded, discontinuous umbilical flange ; and 

 inclined, raised, beaded ventral sutures. It is more closely related to 

 G. area (Cushman) than to G. stuarti stuarti (de Lapparent). 

 2. The paratypes of G. falsostuarti include forms belonging to G. stuarti stuarti 

 (de Lapparent), G. conica White, G. esnehensis Nakkady & Osman and 

 G. fareedi sp. nov. 

 The similarity in the shape of the chambers and the sutures on both sides, the 

 distinctly lobate, circular periphery and the entirely single keel, suggest that G. 

 fareedi sp. nov. has possibly evolved from G. elevata (Brotzen) in early Maestrichtian 

 time, although its evolution from G. stuarti stuarti (de Lapparent) is not excluded. 

 Again, G. fareedi may have evolved into G. esnehensis Nakkady & Osman in early 

 Middle Maestrichtian time by increasing the convexity of the dorsal side and flatten- 

 ing the ventral side. The diagnostic features and stratigraphical ranges of these 

 species favour these propositions. 



This species is named after Dr. Fareed El-Naggar of the National Institute of 

 Management Development, Cairo. 



Holotype. P.45528. 



Paratypes. P. 45666. 



Horizon and locality. Holo- and paratypes, from Sample No. 24, W. El- 

 Sharawna section. 



Stratigraphical range. G. fareedi occurs as rare to common in the L. Maestri- 

 chtian G. fornicata Zone, common to abundant in the Middle Maestrichtian G. 

 gansseri Zone, and dies out in the basal part of the Upper Maestrichtian G. esnehensis 

 Zone. 



Globotruncana fornicata ackermanni Gandolfi 



(PL 14, figs. 3a-sd) 



1955 Globotruncana fornicata ackermanni Gandolfi : 42-43, pi. 2, figs. $a-jc. 

 ? 1958 Globotruncana fornicata ackermanni Gandolfi ; Ansary & Fakhr : 135, pi. 2, figs. i6a-c. 



Description. (Specimen, PI. 14, figs. \a-d.) Test small, biconvex, coiled in a 

 low trochospire ; dorsal side slightly convex, moderately inflated, ventral side 

 inflated, moderately protruding ; equatorial periphery roughly ovoid or rather 

 quadrate, moderately lobate, with two well-developed, delicately beaded, slightly 

 diverging, imbricate keels, enclosing a wide, slightly depressed peripheral band ; 

 axial periphery globular, subtruncate ; chambers on the dorsal side 15, arranged in 3 

 dextrally coiled whorls ; the initial ones are small, globular, inflated, increase 

 slowly in size and are followed by relatively larger, globular, more inflated chambers 

 which increase moderately in size ; the last whorl is composed of 4 large chambers 

 which are subglobular in the early part, crescentic and strongly elongated in the 

 direction of coiling in the later part and which increase rapidly in size ; the last 

 chamber is very well-developed and constitutes about \ of the test ; on the ventral 



